Scale Drawing & Scale Factor

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What is a scale drawing?

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A scale drawing is a representation of an object or space that is proportionally reduced or enlarged to fit on paper, using a specific scale.

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What does scale factor mean?

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The scale factor is the ratio of a length in a scale drawing to the corresponding length in the actual object.

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How do you calculate the actual length from a scale drawing?

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To find the actual length, multiply the length in the scale drawing by the scale factor.

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If the scale is 1 cm : 4 m, how do you convert 5 cm in the drawing to actual meters?

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Multiply 5 cm by 4 m/cm to get 20 m.

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What is the scale factor for a toy eraser pencil (2 cm) to a real pencil (11 cm)?

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What is the scale factor for a Lego figure (3 cm) to a real kid (33 cm)?

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If a toy alligator measures 7 inches and the real alligator measures 175 inches, what is the scale factor?

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What is the purpose of using scale drawings?

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Scale drawings help visualize and plan real-life objects or spaces in a manageable size.

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How do you express a scale of 2 inches : 5 feet as a fraction?

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